Note 4 - Loans and Allowance for Loan Losses (Details) - Allowance for Loan Losses and the Recorded Investment of Loans (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$ 1,688		$ 2,625
Collectively evaluated for impairment	5,276		3,530
Total ending allowance balance	6,964	7,928	6,155	7,266	6,468	6,905
Loans:
Loans individually evaluated for impairment	19,499		14,696
Loans collectively evaluated for impairment	567,372		551,623
Total ending loans balance	586,871		566,319
Residential Portfolio Segment [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	115		213
Collectively evaluated for impairment	1,544		1,037
Total ending allowance balance	1,659	1,957	1,250	1,351	1,192	1,329
Loans:
Loans individually evaluated for impairment	1,829		1,438
Loans collectively evaluated for impairment	209,069		212,570
Total ending loans balance	210,898		214,008
Commercial Real Estate Portfolio Segment [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	670		1,541
Collectively evaluated for impairment	1,875		1,266
Total ending allowance balance	2,545	3,171	2,807	3,395	3,034	3,946
Loans:
Loans individually evaluated for impairment	11,840		10,382
Loans collectively evaluated for impairment	178,925		175,284
Total ending loans balance	190,765		185,666
Commercial and Industrial [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	898		864
Collectively evaluated for impairment	740		441
Total ending allowance balance	1,638	1,651	1,305	1,647	1,342	783
Loans:
Loans individually evaluated for impairment	5,612		2,658
Loans collectively evaluated for impairment	74,801		61,707
Total ending loans balance	80,413		64,365
Consumer Portfolio Segment [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	5		7
Collectively evaluated for impairment	1,117		786
Total ending allowance balance	1,122	1,149	793	873	900	847
Loans:
Loans individually evaluated for impairment	218		218
Loans collectively evaluated for impairment	104,577		102,062
Total ending loans balance	$ 104,795		$ 102,280